Warp-stop-motion mechanism.



No. 805,133. y PATENTED NOV. 21, 1905. E. GUILBERT.

WARP STOP MOTION MECHANISM.

APPLIOATION PILED APR.27. 1905. V

:UNITED STATES PATENT OFFICE.

EDMOND GUILBERT, OF WOONSOCKET, RHODE ISLAND, ASSIGNOR TO DRAPER COMPANY, ,OF HOPEDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE.

I No. &05,133.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed Apr12'7, 1905. Serial No. 257,575.

To all whom, it may cancer-n:

Be it known that I, EDMOND GUILBERT, a citizen of the United States, and a resident of VVoonsocket, county of Providence, State of Rhode Island, have invented an Improvement in Warp-Stop-Motion Mechanism, of which the following description, in connection with the accompanying drawings, is a specification,

like figures on thedrawings representing like parts.

v This invention relates particularly to that class of wa'p-stop-motion apparatus wherein the actuation of a stopping instrumentality is effected by or through release of a stop-motion-controlling detector of a series, said detectors being maintained inoperative by normal warp-threads. In this well-known type of mechanism the detector, When released by failure or undue slackness of its warp-thread, descends into operative position and through mechanical or electromechanical means the stopping instrumentality is actuated. The operation of a loom causes the warp-threads to constantly move longitudinally back and forth as the lay oscillates, and such movement causes the Warp-threads to saw through the warp-eyes of the detectors, abrading and sometimes even breaking the threads.

My present invention has for its object the production of means whereby the detectors are enabled to partake of the back-and-forth movement of the warp-threads, and wholly by or through such movement, so that the sawing of the threads is practically eliminatcd.

The various novel features of my invention will be fully described in the subjoined specification, and particularly ponted out in the following claims.

I have herein shown my invention applied to a loom.

Having reference to the accompanying drawngs, Figure 1 is a cross-sectional View of a suflicient portion of a loom to be understood, with one embodiment of my invention applied thereto. Fig. 2 is an enlarged front elevation, centrally broken out, of the stop-motion mechanism illustrated in Fig. l. Fig. 3 is an enlarged sectional detail of such mechanism as it is shown in Fig. 1, and Fig. 4 is a similar view showing my invention appled to an electromechanical stop-motion apparatus.

Referring to Fig. l, I have shown the controlling-detectors as arranged in two parallel banks or series between the harnesses 1 and whip-roll 2, each detector 3, preferably made of thin sheet metal, having an elongated longitudinal slot L in its upper portion and a warp-eye 5, through which a single warp-- thread 6 passes in well-known manner. A transverse support, shown as a narrow bar 7 set on edge, is eXtended through the slots L of each series of detectors to support a detector when released by failure or undue slackness of its warp-thread in a manner well known to those skilled in the art. The lower ends of the detectors depend between upright plates 8 8, which constitute back-steps, Figs. 1, 2, and 3, when a released detector is engaged by the feeler 9, mounted on a shaft 10, which is normally oscillated, arrest of the feeler by a released detector acting to eect the operation of a stopping instrumentality (notshown) in a familiar manner. The supports 7 are generally attached to brackets fixedly Secured to the loom-frame, so that while the detectors could move longitudinally they could not move in the direction of warp travel, or fore and aft, and the threads sawed back and forth through the Warp-eyes.

In the present embodiment of my invention, as illustrated in Figs. l, 2, and 3, upright stands ll are Secured to the brackets 12, which sustain the back-stops 8 and the hangers 13 for the feeler rock-shaft 10, the stands having at their upper ends opposite inturned pins 14:,(see Fig. 2,) on which are pivotally mounted the hubs of depending arms or carriers 15, to which the ends of the detector-supports 7 are attached. The fulcrum-pins 14 are parallel to the supports and are a considerable distance above them, and they are also at right angles to the paths of movement of the warp-threads, and as the latter move back and forth during the shedding operation the detectors and their supports are free to move fore and aft with them on the pins 14 as fulcra, thus obvatng sawing of the threads through the Wa1*p'-eyes, the movement of the warp-threads back and forth providing the sole means for swinging the supports and moving the detectors. The back-stops 8 limit the fore-and-aft movement of the detectors, as will be manifest, and the feeler is mounted wholly independent of the detector-supports 7 and the carriers l. A rod 16, extended from one to the other bracket 12 between the IOO lower ends of the two banks of detectors, acts as a Separator, and the rounded upper edges of the back-stops serve as warp-rests.

My invention is equally well adapted for use in connection with electromeehanical warp-stop-motion mechanism, as illustrated in Fig. 4, Wherein the metallio detectors or drop-pieces 17 are longitudinally slotted to receive the supports 18, which are terminals of an electrical circuit. In the upper edges of the supports and insulated therefrom are contact-strips 19, connected clectrically at 20 With the other side of the cireuit, and normally the latter is open; but when a detector is released it drops and engages with the contact-strip 19, as well as with the terminal and support 18, completing the circuit and through any suitable means eflecting the operation of a stopping instrumentality. The supports 18 are attached at their ends to carriers 21, depending from 'ulcrum-pins 22 on upright stands 23, substantially as has been described, so that the detectors and their supports 18 can move 'ore and aft with the movement of the warp-threads.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a Warp-stop-motion mechanism, a series of stop-motion-controllingdctectors maintained inoperative by normal warp-threads, a Support for and With relation to which the detectors are movable when released, a teeler to coperate with a released detoctoiy mounted independently of said support, and means to permit limited movement of said support and the detectors by and with the warp-threads in the direction of their length.

2. In a warp-stop-motion nechanism, a series of stop-motion-controlling detectors maintained inoperative by normal warp-threads,

to sustain the support and permit bodily i movement thereof and of the detectors With the warp-threads in the direction of their travel solely by or through the action of the warp-threads upon the detectors.

3. In a warp-stop-motion for looms, a Series of stop-motion-controlling detectors maintained inoperative by intact warp-threads and adapted When released to effect the actuation of a stopping instrumentality, a support for and relatively to which the detectors are movable when released, and overhead means to pivotally sustain the support and permit limited bodily swinging movement thereof With and in the direction of travel ot' the warpthreads, such movement of the support being ettected solely by or through the warpthreads.

4:. In warp -stop motion mechanism for looms, vertically-movable stop-motion-controlling detectors arranged in a plurality of parallel series and maintained inoperative by normal warp-threads, a transverse support foreach series of detectors, and pivotally-mounted depending and freely-swinging carriers to which the ends of the supports are attached, to permit movement ot' the detectors by and with the warp-threads in the direction of travel of the same.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDMOND GUILBERT.

l/Vitnesses:

J OSEPH M. PRAVEROHER, Jr., WVILLIAM Gr. MAILLOUX. 

